Reverted back to 8.1 and now 10 keeps auto installing at every boot up

I upgraded to Windows 10. I didn't like it. I reverted back to 8.1. Now, every time I turn my laptop on, the Windows Update screen pops up and starts installing Windows 10. I have changed auto update settings to ask me first, but to no avail. I even selected DO NOT check for updates, to no avail. How do I get this to stop? Thanks.

Try using option #3 in the linked thread to remove the notification: https://www.tenforums.com/tutorials/6...s-7-8-1-a.html